我的枚举、数据表和数据网格有问题。我有以下代码:
StateEnum.cs:
public enum StateEnum
{
Pass,
Fail,
Mandatory,
Retest
}
主窗口.xaml.cs:
private void Button_Click(object sender, RoutedEventArgs e)
{
ViewModel.MainViewModel vm = VmSingleton.GetVmInstance();
vm.ModuleRecords = new System.Data.DataTable();
DataTable dt = new DataTable("TableName");
dt.Columns.Add("Id",typeof(int));
dt.Columns.Add("Operation1", typeof(StateEnum));
dt.Columns.Add("Operation2", typeof(StateEnum));
dt.Columns.Add("Operation3", typeof(StateEnum));
dt.Columns.Add("Operation4", typeof(StateEnum));
vm.ModuleRecords = dt;
for (int i = 0; i < 5; i++)
{
DataRow newDR = dt.NewRow();
foreach (DataColumn col in dt.Columns)
{
int j = 1;
if (col.ColumnName == "Id")
newDR[col.ColumnName] = i + j;
else
newDR[col.ColumnName] = StateEnum.Pass;
j++;
}
dt.Rows.Add(newDR);
}
}
主窗口.xaml
…
<DataGrid Grid.Row="0" ItemsSource="{Binding ModuleRecords}" AutoGenerateColumns="True" />
<Button Grid.Row="1" Content="Ok" Click="Button_Click"/>
…
虽然Id显示在单元格中,但单元格中的枚举不会直接显示。当我点击一个单元格时,我可以选择正确的枚举。我该怎么修?
编辑:
我很抱歉描述不清。在我的情况下,我想显示数据表的数据,因为我不知道在设计时需要显示多少数据。这就是为什么要选择一个数据表。在我的例子中,我可以做或多或少的手术,但我不知道有多少。。。
我想我在这里发帖之前已经把我的问题简化得太多了。这个代码示例使它更清晰,我希望:
private void Button_Click(object sender, RoutedEventArgs e)
{
DataAccess.DataAccessor accessor = new DataAccess.DataAccessor();
// i dont know how much operations i got at design time
List<string> operationHeaders = accessor.getOperationHeaders();
ViewModel.MainViewModel vm = VmSingleton.GetVmInstance();
vm.ModuleRecords = new System.Data.DataTable();
DataTable dt = new DataTable("TableName");
dt.Columns.Add("Id",typeof(int));
// this is because i have to go through with a for-each
// to initialize the header of the table
foreach (string header in operationHeaders)
{
dt.Columns.Add(header, typeof(StateEnum));
}
vm.ModuleRecords = dt;
// fil the datatable with data...
...
}
我希望现在情况更清楚了。。。
编辑2:
我的问题是枚举值的绑定无法正常工作。我在Viewmodel中设置了值,但datagridview中的枚举属性只显示一个空白单元格。我希望看到枚举属性的值,例如"通过"或"失败"。。。当我点击一个单元格时,我会看到枚举的可能值,但它不是直接设置的。
您不需要使用DataTable,而是使用POCO,在迁移到MVVM时,您的生活会轻松很多。下面的要干净得多
我已经复制了完整的Windows代码,这样你就可以运行演示而不会遇到麻烦,但你必须注意xaml导入的命名空间和Window。参考资料部分:
namespace WpfApplication1
{
public enum StateEnum
{
Pass,
Fail,
Mandatory,
Retest
}
public class ModuleRecord
{
public int Id { get; set; }
public StateEnum Operation1 { get; set; }
public StateEnum Operation2 { get; set; }
public StateEnum Operation3 { get; set; }
public StateEnum Operation4 { get; set; }
}
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
ModuleRecords = new ObservableCollection<ModuleRecord>();
}
public ObservableCollection<ModuleRecord> ModuleRecords { get; set; }
private void Button_Click(object sender, RoutedEventArgs e)
{
for (int i = 0; i < 5; i++)
{
int j = 1;
var mRecord = new ModuleRecord();
mRecord.Id = j;
mRecord.Operation1 = StateEnum.Pass;
mRecord.Operation2 = StateEnum.Pass;
mRecord.Operation3 = StateEnum.Pass;
mRecord.Operation4 = StateEnum.Pass;
ModuleRecords.Add(mRecord);
}
DataContext = this;
}
}
}
他们是xaml
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
xmlns:local="clr-namespace:WpfApplication1"
xmlns:System="clr-namespace:System;assembly=mscorlib">
<Window.Resources>
<ObjectDataProvider x:Key="EnumDataProvider"
MethodName="GetValues"
ObjectType="{x:Type System:Enum}">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="local:StateEnum"/>
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</Window.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<DataGrid Grid.Row="0" ItemsSource="{Binding ModuleRecords}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Path=Id}" Header="Id" />
<DataGridComboBoxColumn Header="Operation1" ItemsSource="{Binding Source={StaticResource EnumDataProvider}}" SelectedValueBinding="{Binding Operation1}" />
<DataGridComboBoxColumn Header="Operation2" ItemsSource="{Binding Source={StaticResource EnumDataProvider}}" SelectedValueBinding="{Binding Operation2}" />
</DataGrid.Columns>
</DataGrid>
<Button Grid.Row="1" Content="Ok" Click="Button_Click"/>
</Grid>
</Window>